[all-commits] [llvm/llvm-project] 6b92a3: [flang][OpenMP] Detect BLOCK construct through loo...

[Krzysztof Parzyszek via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 6b92a3bc21cdcdeb161a06524a9860551831c67e
      https://github.com/llvm/llvm-project/commit/6b92a3bc21cdcdeb161a06524a9860551831c67e
  Author: Krzysztof Parzyszek <Krzysztof.Parzyszek at amd.com>
  Date:   2025-07-25 (Fri, 25 Jul 2025)

  Changed paths:
    M flang/lib/Parser/openmp-parsers.cpp

  Log Message:
  -----------
  [flang][OpenMP] Detect BLOCK construct through lookahead (#150617)

Avoid parsing the entire ExecutionPartConstruct in either the strictly-
or the loosely-structured block parser only to discard it when it's not
BLOCK (or is BLOCK) respectively. Doing so was not incorrct, but in
pathological cases (like Fujitsu 0981_0034) the recursive parsing can
take a very long time.

Instead, detect the presence of BLOCK first (via a simple lookahead),
and fail immediately if necessary.



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